drm/amdgpu: fix to clear ASIC INIT COMPLETE bit on resuming phase
ASIC_INIT_COMPLETE bit must be cleared during S3 resuming phase,
because VBIOS will check the bit to decide if execute ASIC_Init
posting via kernel driver.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
index 4b9abd6..d735cd1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
@@ -26,6 +26,7 @@
#include "atomfirmware.h"
#include "amdgpu_atomfirmware.h"
#include "atom.h"
+#include "atombios.h"
#define get_index_into_master_table(master_table, table_name) (offsetof(struct master_table, table_name) / sizeof(uint16_t))
@@ -77,6 +78,12 @@ void amdgpu_atomfirmware_scratch_regs_restore(struct amdgpu_device *adev)
{
int i;
+ /*
+ * VBIOS will check ASIC_INIT_COMPLETE bit to decide if
+ * execute ASIC_Init posting via driver
+ */
+ adev->bios_scratch[7] &= ~ATOM_S7_ASIC_INIT_COMPLETE_MASK;
+
for (i = 0; i < AMDGPU_BIOS_NUM_SCRATCH; i++)
WREG32(adev->bios_scratch_reg_offset + i, adev->bios_scratch[i]);
}